Instruction Manual
299H Series
12
3. Remove the bonnet (key 34), spring seat (key 33)
and control spring (key 32).
4. If only replacing the control spring (key 32),
sparingly apply lubricant to the control spring seat
(key 33) and reassemble in the reverse order.
Note
When replacing the control spring with
a different spring range, be sure to
delete the spring range appearing on the
nameplate and indicate the new range.
5. Remove the machine screws (key 30) and spring
case (key 31) from the lower casing (key 1).
6. Remove the diaphragm assembly (key 28) by tilting
them so that the pusher post (key 40) slips off the
lever (key 57). To separate the diaphragm from the
attached parts, unscrew the hex nut (key 37) and
separate the parts: washer (key 38), diaphragm
post (key 39), pusher post (key 40), overtravel
spring (key 41), machine screw (key 42), spring
seat (key 88) (Types 299HR and 299HSR), rivet
(key 43) and retaining ring (key 44).
7. To replace the lever assembly (key 57), remove the
lever pin (key 25). To replace the valve stem
(key 48), also perform Integral Pilot Valve Disk and
Orice maintenance procedure steps 1, 2 and 3
and pull the stem (key 48) out of the lower casing
assembly (key 1). Lightly lubricate the replacement
stem O-ring (key 53) and install it on the valve stem.
8. Install the valve stem (key 48) into the lower
casing assembly (key 1). Be careful not to cut the
O-ring (key 53) when sliding the valve stem into
the lower casing.
9. Reinstall the diaphragm (key 28) assembly using
the reverse order of step 6.
10. Place the spring case (key 31) on the lower casing
(key 1) with the vent (key 27) oriented downwards
to prevent clogging or entrance or moisture. Install
the machine screws (key 30) and tighten in a
crisscross pattern using 12 to 18 inch-pounds /
1.4 to 2.0 N•m of torque.
11. When all maintenance is complete, refer to the
Startup section to put the regulator back into
operation and adjust the pressure setting. Tighten
the locknut (key 35) and install the closing cap
(key 29).
Type VSX-2 Maintenance
Parts numbers are referenced in Figure 7. The
Type VSX-2 device (key 1) is designed to be
removed as a unit from the Type 299HS body
(key 17) and be replaced as a complete unit. The
only replaceable parts in the Type VSX-2 module
are the O-rings (keys 2 and 3) and the high and
low pressure springs (keys 7 and 8). The high and
low pressure springs may be adjusted or replaced
without removing the slam-shut device from the
Type 299HS body.
Optional P590 Series Filter
Keys are referenced in Figures 3 and 6. If clogging
is suspected in the upstream regulator passages,
disconnect the pilot supply tubing (key 21, Figure 6),
remove the lter assembly (key 72) and check for lter
clogging. If necessary, to clean or replace lter parts,
remove the following: lter body (key 1), machine
screw (key 4), spring washer (key 6), gasket
(key 7), washer (key 5) and lter element (key 2).
Upon reassembly, place one at washer (key 5)
between the lter element and lter head (key 3) and
the other between the lter element and gasket.
Optional Type 67CF Pilot Supply
Regulator
For complete installation, maintenance and parts list
refer to the 67C Series Instruction Manual.
Parts Ordering
The type number, orice size, spring range and date of
manufacture are stamped on the nameplate. Provide
this information along with the eleven-character part
number to your local Sales Ofce when ordering parts.
If construction changes are made in the eld, be sure
that the nameplate is also changed to reect the most
recent construction.